Each box - $1.25
24 or more $1.00 each
72 or more $0.88 each
144 or more $0.75 each

Use the drop-down box for quantity discounts then put the number you want in the quantity box.
Example: You want 25 boxes - use drop-down "24 or more" and enter 25 as your quantity.
You can mix colours for larger discounts.